Improvement in the modes of balancing cylinders, pulleys



ilcita mes @anni ditta.

Letters Patent No. 110,247,'da.ted December 20, 1870.

IMPROVEMENT IN THE MODES OF BALANCING CVLINDERS, PULLEVS, &c.

The Schedule referred to in these Letters Patent and making part of the same,

To all whom it may concern Be it known that I, WILLIAM KITsoN, otLo'well,-

in the county o1' Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Balancing Cylinders, Pulleys, 85e., of which the following is a full, clear, and exact description, reference being had to the accompanying drawing maliinfr par't of this specification, in whichiigure l represents a longitudinal sectional elevation of a cylinder having my improvement applied thereto.

Figure 2 is a transverse section of fig. 1.

- Figure 3 is a sectional elevation of a pulley or cylinder having no heads or ends;

Figure 4, an end elevation ot' the same;

Each of the two latter figures showing my improvement applied.

This invention relates to the method, mode, or means of balancing cylinders or other rotary movers which revolve at ahigh velocity, and which require to be evenly balanced to prevent their throwing orshaking connected parts or surrounding objects in the apartment where they are operated; also, to prevent unevenly wearing their bearings or journal-boxes, and the liability ofetheir bursting or breaking when revolving at a high velocity.

This invention consists of a balancing-tube, b, provided with plugs or stopplcs d, and applied to a cylinder or a pulley, whereby sutlcient kbalancing material, c, may bc placed within the tube and secured by lthe plugs, all as clearly shown in the drawing.

Then applied to a cylinder having two heads or ends,'the tube is inserted in holes made through the latter in close proximity' with a shell or cylindrical portion B, and the ends of the tube secured by staking or riveting, or otherwise, first indingthe lightest side of the cylinder by suspending it on centers or on straight edges, in the usual way, thereby appl-ying the tub'e at or near snel-r light side ot the cylinder, and

while on thccenters or on the straight edges, inserting thc balancing material c until the cylinder is evenly balanced or until it will turn on the staiglit edges one way as well as in another, or rather until it will remain at rest iii any position with its bearing on the straight edges.

It sometimes happens that cylinders require rbalancing in two orzmore places; in such cases I insert two or more tubes and apply the balancing material in each suiicient to overcome the weight on opposite sides of the cylinder. In balancing pulleys or cylinders having no heads or ends, I generally secure the tube to the rim or shell B by screws e inserted through cars projecting from the ends of the tube or through the sides of the lattcr into the shell B, as clearly shown in figs. 3 and 4.

Centrifugal action of the revolving pulley or cylinder has a tendency to press the tube against the inner side of the rim or shell; consequently two screws willg generally hold the tube firmly in position, but other t'ast-enings may be inserted or applied it' found -necessarv. i

The tube b shown in fig. l should properly be sct close-to the rim or shell Bof the cylinder, leaving no space between them.

Sectional cylinders or those having their shells or circumferential surfaces formed of' lags, bars, or blades with wide pr narrow spaces between them, may be readily balanced by using my improvement and applying the sam'e to the inner surfaces or the inner peripheries of such bars, lags, or blades, or through broad anged heads or endswhich hold the latter -in position, and the balancing matcrialplaced within the tube and secured, as, clearly shown and described.

I contemplate that, in balancing some kinds of cylinders or pulleys orv other rotary movers, thc metal tube alone will be sniicient to balance the instrument -without the material c being applied within thc tube,

or requiring little or no suoli balancing material.

I therefore wish it distinctly understood that I do not rely wholly upon the balancing material c when it is not required, and when the weight of the tube proves to besufcient to balance the cylinder, I consider the balancing material included in such tube.

Ihe balancing material may be pieces of lead, stone, or other article of specific gravity commonly used for balancing purposes.

I claim as my invent-ion- A balancing tube, b, provided with plugs or stopples d, and applied tothe cylinder or pulley, as sho-wn and described, whereby such cylinder `or pulley may -be balanced by the tube b or by additional ybz'tlancing material c, in the manner and for the -purposespecified.

Witnesses:

JOHN E. CRANE, EDWIN O. Tnonsron.

WILLIAM KITSON. 

